Extract the folder inside the zip to your desktop. You should have a folder that says: VX_Bin_Files (Where X is the version firmware you are flashing [4/6/7])
IT IS CRUCIAL YOU FOLLOW THESE NEXT FEW STEPS IN ORDER!
STEP 3: Install the File LGNPSTv1.3_Lab_Verison_RightClickReg.msi.
STEP 4: When that completes, install the Components: LGNPST_Components_Ver_5_0_12_0.msi LGNPST_Components_Ver_5_0_20_0.msi.
STEP 5: When that completes, install the GenericModels: LGNPST_GenericModels_Ver_5_0_10_0.msi LGNPST_GenericModels_Ver_5_0_12_0.msi.
STEP 6: Once finished installing those 3 files, open a new windows explorer window and navigate to C:\LG Electronics\LGNPST.
STEP 7a: Go back to your LGNPST_TOOLS folder and copy the LGNPST_VS920.dll file to C:\LG Electronics\LGNPST.
STEP 7b: Right click on the LGNPST_VS920.dll and choose 'Register'
OPTIONAL STEPS TO REGISTER DLL
STEP 8a: Go to Start>Programs>Accessories>Command Prompt.
STEP 8b: In the command prompt window type WITH the quotes:
cd "C:\LG Electronics\LGNPST"
and press enter.
STEP 8c: You should now be at a prompt that says
STEP 8d: Type in:
(If successful it should say the file was registered successfully, If you get an error message, Reboot your PC and try again.)
STEP 8: Close out of all the windows explorer windows, you shouldn't need them anymore at this point, and Double click on the LGNPST shorctut on your desktop.
STEP 9: When LGNPST loads, have your phone plugged in with USB Debugging on. In a couple minutes it should display a phone, click on it then go to File>Select DLL, and choose the LGNPST_VS920.dll file from the list.
STEP 10: Click the Provision tab and select upgrade.
STEP 11: Where it says BIN File, click the folder button and browse to the BIN folder in the Vx_Bin_Files (Where X is the version firmware you are flashing [4/6/7]) directory on your Desktop.
STEP 12: Click the VS920ZV4_04.bin or VS920ZV6_00.bin or VS920ZV7_15.bin file then click Open.
STEP 13: Click the START button, and DO NOT touch anything while this runs, this will switch the phone to the EMERGENCY DOWNLODING, DO NOT UNPLUG screen.
STEP 14: This process should take about a half hour at the very most to complete. Usually takes < 20min
STEP 15: Once the phone is on, you will probably get a bunch of Force Close boxes. Unplug the phone, and pull the battery then re-insert.
STEP 16: Do a factory reset by pressing and holding VOL DOWN+[HOLD]POWER+([PRESS TWICE]POWER... DO THIS ONLY AFTER YOU GET THE FACTORY RESET CONFIRMATION SCREEN).